Biology – Quantitative Biology – Populations and Evolution
Scientific paper
2008-06-11
Biology
Quantitative Biology
Populations and Evolution
21 pages, 8 figures
Scientific paper
We study the effects of switching social contacts as a strategy to control epidemic outbreaks. Connections between susceptible and infective individuals can be broken by either individual, and then reconnected to a randomly chosen member of the population. It is assumed that the reconnecting individual has no previous information on the epidemiological condition of the new contact. We show that reconnection can completely suppress the disease, both by continuous and discontinuous transitions between the endemic and the infection-free states. For diseases with an asymptomatic phase, we analyze the conditions for the suppression of the disease, and show that, even when these conditions are not met, the increase of the endemic infection level is usually rather small. We conclude that, within some simple epidemiological models, contact switching is a quite robust and effective control strategy. This suggests that it may also be an efficient method in more complex situations.
Risau-Gusman Sebastian
Zanette Damian H.
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